Ball pulverizing mill



F. A. BREWER ET AL pr. 24, 192-3. L 1,452,786

. BALL PULVERIZING MILL Filed Aug. 11 1921 III Q /I// x' w Iran/2' flfircwer and (Zearge Wlflransion Patented Apr. 24, 1223 7 452,?

ERARK A. BREWER AND GEoRGE W. BRANSTON, or VANCOUVER, BRITISH COLUMBIA, CANADA; SAID BREWER ASSIGNOR OF HIS ENTIRE RIGHT TO FRANK A. BREWER, an, or VANCOUVER, BRITISH COLUMBIA, CANADA.

BALL PULVERIZING MILL.

Application filed August 11, 1921. 'Serial No. 491,414.

To all cola-omit may concern: Where the primary crushing is effected, has

Be it known that we, FRANK A. BREWER the largest wearing surface, the largest numand GEORGE W. BRANSTON, citizen of the Dober of balls and the highest speed of moveminion of Canada and subject of the King ment. 55 of GreatBritain, respectively, residing at The balls are spaced close together and Vancouver, in the Province of British (30- on those 9 of the lower race rests a rin -10 lumbia, Canada, have invented certain new of especially hard metal recessed into a rivand useful Improvements in Ball Pulverizing head 1.1 secured on the lower end of a ing Mills, of which the fOllOWiHg is a specivertical shaft 12. Adjacent the upper end 60 10 fi ti where the driving pulley 13 is secured, by This invention relates to a rock pulverizer which rotation is imparted, the shaft runs of that class wherein the crushing of the in a bearing 14 of lignum vitae carried in a rock is effected by the rotation of a multiple bridge bracket 15 secured to the upper ball series of balls around circular tracks shaped race ring 3. 15 to the conformation of the lower part of the From the upper side of the driving head balls. p 11 portions 16 upwardly project to fit corre- The improvements are directed to the sponding pockets 17 in the driving head 18 manner of driving the balls whereby they of the intermediate race of balls 20. This are free to adapt themselves to the inequalihead 18 is recessed as before described to 70 20 ties of the track and to the manner whereby receive the ring 19 of especially hard ,metal the rock as pulverized is washed inward which rests on the balls 20.

through the ball races in opposition to the This driving head 18 has projections 21 centrifugal tendency outward. which engage in pockets 22 formed in the The invention is particularly described in driving head 23 of the upper race of balls 75 the following specification, reference being 25, which driving head as before is recessed made to the drawings by which it is accomto receive a grooved bearing ring 2/1. 9

'panied, in which: Secured to the outer edge of the uppe Fig. 1 is a vertical section through the supporting ring 3 is a water-tight casing 26 device. and in the top of this casin is a hopper 30 Fig. 2 is a plan with portions removed to opening 27 I through which .t e ore to be show the successive ball rings and the agicrushed is delivered outside the upper ring tator in the pulp delivery outlet. of balls 25, and to the inner circle of the In these drawings 2 represents a circular lower race ring 5 is secured a flared delivery stand on which the entire machine is suppipe 28 through which the pulp is conveyed 35 ported. The foundation rings 3, 4 and 5 from the pulverizer for such further treatof the grooved ball race rings are separately ment as may be considered necessary.

cast and are secured together by studs, the In use, the rock to be pulverized is dejoints being rendered water-tight, preferlivered at the feed hopper 27 with a suffiablyb means of a circumferential groove in ciency of water, and falls upon the outer the joint, into which a wire of soft metal, edge of the upper driving head 23, which is such as lead, maybe laid before they are shaped as shown in thedrawing to receive tigllitened up. I it, and is provided with radial vanes 29 by ach supporting ring 3, 4, and 5 is rewhich the rock is distributed around the cessed to receive its ball .race, 6, 7 and 8, annular space outside the. upper race of so that these races are renewable and may balls. The conformation. of the inner side be made of especially hard metal to stand of the ring'3, which carries the upper ball the severe wear. As shown in the drawing race ring 6 is such as will feed the rock the balls and the diameter of the races in directly to the balls.

which "they run are stepped smaller down- The rock a sipulverized in this ring of balls ward, so that the upper ball race. into which is carried by the water flow, inward through the rock to be crushed is delivered and the balls in opposition to the centrifugal ment of the driving-head and balls. Therefrom it falls into the annular s ace 31 communicating with the interme late race of balls 20 and receives a further supply of water delivered at 34 into an annular space between an upward pro ection from the upper driving head. and a similar tubular rejection 36 from the intermediate drivmg head 18.

This flow of water carrles the pulverized material through between the balls of the intermediate ring in the same manner as in the upper ring. that is, in opposition to the centrifugal tendency outward. From the intermediate race of balls 20, the pulp and water are delivered into the annular space 32 between the intermediate ball ring and the lower driving head 11 and receives a further supply of water which is delivered at 37 to the lignum vitae bearing of the shaft 12 and thereafter passes through the space, between 36 and the shaft 12. The pulp as ,before is washed inward through the ball race by the water flow and is delivered into the flared delivery outlet 28.

In the annular spaces 31 and 32 between the race rings and the driving heads 18 and 11 and on the inner wall of the lower ring 5, rings of corrugated amalgamated metal "are introduced against which the pulp is splashed by rotation of the driving heads and on which any free gold will be caught before passing through the next race of balls or from the machine.

To project the pulp against the amalgamating. plate in the space between the lower race of balls 9 and the outlet 28 an agitator 38 is secured in the lower end of the shaft 12 to rotate with it. Ifthe character of the ore being crushed is such as to require it. a cyaniding solution may be introduced at 39 and agitated with the pulp, in which case the amalgamating plate of this chamber is not required.

These features of amalgamation and provision for cyaniding are not material to the function of the machine asa pulverizer, but are valuable adjuncts for the introduction of which the machine is particularly adapted.

If the rock is crushed to the desired fineness before amalgamation. the finer particles of free gold are liable to'be carried away in the slimes, whereas in this mill the amalgamation is provided for in each successive stage of the crushing whereby this defect is in large measure provided against.

By adopting a bearing of wood for the driving shaft 12, which hearing may be lubricated with water, the use of oil in the mill is entirely avoided, the presence of which oil is objectionable in amalgamation.

Although the machine has been designed as a wet mill with provision for delivering water to wash the pulp inward through the ball races. in opposition to the centrifugal tendency outward, the construction of the mill is particularly favourable for dry milling. Naturally, when used as a dry mill,

it is also particularly accessible for examination and for repair and the several parts are none of them of such weight as will be troublesome in transportation.

Having now particularly described our invention. we hereby declare that what we claim as new and desire to be protected in by Letters Patent, is:

1. A ball pulverizer, comprising the combination with a suitable base, of a series of concentrically grooved rings supported in stepped relation thereon, balls in the grooves of the several rings, a driving head grooved to rest on the balls in the innermost ring. a shaft secured to that driving head by which it is rotated, a grooved driving ring separately mounted on each other ring of balls, each of which driving rings except the bottom one is in driving connection with the one next smaller in diameter but is independent of direct attachment to the driving shaft, means for delivering the rock to be crushed outside the outermost ring of balls, means for distributing, it around the ring, and means for delivering the ore as crushed in one ring to the next inner ring and from the innermost ring to the delivery outlet.

2. A ball pulverizer, comprising the combination with a suitable base. of a series of concentrically grooved rings supported in stepped relation thereon, balls in the grooves of the several rings, a driving head grooved to rest on the balls in the innermost ring. a shaft secured to that driving head by which it is rotated, a grooved driving ring separately mounted on each other ring of balls,

each of which driving rings except the bottom one is in driving connection with the one next smaller in diameter but independent of direct'attachment to the driving head or the driving shaft, means for delivering the rock to be crushed outside the outermost ring of balls, means for distributing it around the ring, and means for delivering the ore as crushed in one ring to the next inner ring and from the innermost ring to the delivery outlet, said means comprising a current of fluid from the outer side of each ring in ward and from the innermost ring to the delivery outlet.

' 3. A ball pulverizing mill, comprising the combination with a suitable base, of a series of concentrically grooved rings supported ion in stepped relation thereon, balls in the grooves of the several rings, a drivlng head grooved to rest on the balls in the innermost ring, a shaft secured to that driving head by which it is rotated, a grooved driving r ng separately mounted on each other ring of balls, each of which driving rings except the bottom one is in driving connection with the onenext smaller in iameter but independent of direct attachmnt to the driving head or the driving sha means for delivering the rock to be crushed outside the outermost ring of balls, means for distributing it around the rin and means for delivering water with th rock outside each ring of balls.

4. A ball pu I erizing mill, comprising the combination 'th a suitable base, of a series of concentrica 1y grooved rings supported thereon and stepped downward from the outer ring to the lowest inner ring, balls in the grooves of the several rings, a driving head grooved to rest onthe balls in the bottom ring, a shaft secured to that drivin head and by which it is rotated, a grooved driving ring mounted on each other ring of balls, each driving ring independent of direct attachment to the lower driving head but each ring except the bottom one being in driving connection with the one beneath means for delivering the rock to be crushe outside the uppermost ring of balls, means for distributing the rock around the ring, and means for admitting a fluid outside each ring of balls that will carry the rock as crushed from that ring to the next one within and from the inner ring to the delivery outlet.

5. A ball pulverizing mill, comprising the combination with a suitable base, of a series of concentrically grooved rings supported thereon and stepped downward from the outer ring to the lowest inner ring, balls in the grooves of the several rings, the diameter of the balls being proportioned to the diameter of the rings, a driving head grooved to rest on the bottom ring of balls, a shaft secured to that driving head and by which it is rotated, a grooved driving ring mounted on each ring of balls, each driving ring being independent of direct attachment to the lower driving head but each except the bottom one in driving connection with the one beneath, means for delivering the rock to be crushed outside the uppermost ring of balls, means for distributing the rock around the ring, and means for admitting a fluid outside each ring of balls that will carry the rock as crushed from that ring to the next one within and from the inner ring to the delivery outlet.

6. A ball pulverizing mill, comprising the combination with a suitable base, of a series of separable concentrically grooved rings supported thereon and stepped downward from the outer ring to the lowest inner ring, balls in the several grooves, a driving head grooved to rest on the balls in the bottom ring, said driving head having upward projections, a shaft secured to that driving head and by which it 'is rotated, a separate tributing the rock around the ring, and

means for admitting a fluid outside each ring of balls that will carry the rock as crushed from that ring to the next one beneath and from the bottom ring to the delivery outlet.

7. A ball pulverizing mill, comprising the combination with a suitable base, of a series of concentrically grooved rings supported thereon and stepped downward from the outer ring to the lowest inner ring, balls in the grooves of the several rings, a driving head grooved to rest'on the balls in the bottom ring, a shaft secured to that driving head and by which it is rotated, a grooved driving ring mounted on each other ring of balls, each driving ring except the bottom one being in driving connection with the one beneath or within the driving head, means for delivering the rock to be crushed outside the upper ring of balls, means for distributing the rock around the ring, means for admitting a fluid under pressure outside each ring .of balls that will carry'the rock as crushed from that ring to the next one within and from the inner ring to the 'delivery outlet, and a ring of amalgamated metal between each ring of balls and the one beneath and between the lowest ring of balls and the delivery outlet.

8. A ball pulve'rizing mill, comprising the combination with a suitable base, of a series of concentrically grooved rings supported thereon and stepped downward from the outer ring to the lowest inner ring, balls in the grooves of the several rings, a driving head grooved to rest on the balls in the bottom ring, a shaft secured on that driving head and by which itis rotated, a grooved driving ring mounted on each other ring of balls, each ring except the bottom one being independent of direct attachment to the lower driving head but in driving connection with the driving ring beneath, means for delivering the rock to be crushed outside the upper ring of balls, means for distributing the rock around the ring, means for admitting a fluid under pressure outside each ring of balls that will carry the rock as crushed from that ring to the nextone within and from the inner ring to the delivery outlet, and a ring of amalgamated 9. A ba pulverizing mill, comprising the o combination with a suitable base, of a series ,of concentrically grooved rings supported thereon and stepped downward from the .outer ring to the lowest inner ring, balls in the grooves of the several rings, a driving head grooved to rest on the balls on the bottom ring, a shaft secured to that driv ng head and by which it is rotated, a grooved driving ring mounted on each other ring of balls, each driving ring except the bottom one, being independent of directattach ment to the driving head but in driving connection with the driving ring beneath, means for delivering the rock to be crushed outside the upper ring of balls, means for d stributing the rock around the ring, means for admitting a fluid under pressure outside each ring of balls that will carry the rock as crushed from that ring to the next one within and from the inner ring to the delivery outlet, and a ring of corrugated amalgamated -metal vertically disposed between each ring of balls and the one beneath and between the lowest ring of balls andthe delivery outlet.

10. A ball pulverizingmill, comprising the combination with a suitable base, of a series of concentrically grooved rings supported on the base and arranged in stepped order, said rings being of different diameters, that of the greatest diameter being at the top and that'ofthe least diameter being at the bottom, :sets of balls in the grooves of the several rings, grooved driving heads over the several sets of balls, means for turning said driving heads, means for delivering the material to be pulverized to the uppermost ring, means for receiving the pulverized material from within the circumference of the lowermost ring, said rings above the lowermost ring adapted to discharge progressively inward and downward to the next succeeding ring, substantially as shown and described.

In testimony whereof we aflix our signatures.

FRANK A. BREWER. I GEORGE W. BRANSTQN. 

